TrustAgent

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "X-PAYMENT header is required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x6121654D3Fd4C8B42a90d30472E4D40927C3e6BB",
      "trial": {
        "note": "3 free calls of THIS endpoint per wallet per 24h — not a lesser one. Sign `message` below with any wallet, substituting your own address on the wallet line (either casing), and send the two headers in `send`. No funds, no signup, no settlement — a signature proves the wallet is yours and costs nothing. Contract wallets are verified via ERC-1271. Prefer one signature total: POST the same wallet and signature to /v1/trial/claim and send the returned token as `X-Trial-Token` instead.",
        "send": {
          "X-Trial-Wallet": "the wallet that signed, 0x-prefixed",
          "X-Trial-Signature": "the 0x-prefixed signature over `message`"
        },
        "claim": {
          "use": "X-Trial-Token: the token it returns",
          "body": {
            "wallet": "the wallet that signed, 0x-prefixed",
            "signature": "the 0x-prefixed signature over `message`"
          },
          "endpoint": "POST /v1/trial/claim"
        },
        "howTo": "https://trust-agent.io/v1/trial",
        "price": "$0.00",
        "message": "TrustAgent Free Trial v1\nwallet: 0xYourWalletAddress\ngrant: free-tier access to paid TrustAgent endpoints",
        "signWith": "personal_sign (EIP-191)",
        "windowHours": 24,
        "callsPerWallet": 3
      },
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://trust-agent.io/v1/search/agents",
      "description": "Which live agents can do X — and which of them are safe? Searches what ERC-8004 agents DECLARE about themselves — skills, domains, name — across the registrations this service fetches on a rolling sweep, and returns only the ones actually answering. Each row carries the service endpoint to call, the wallet a payment would go to, and the risk band and sanctions verdict for that wallet, so choosing between candidates takes one call instead of a screening per row. Around a third of registrations on Base are live at all — GET /v1/registry publishes the current split, free, so this number can be checked rather than taken; the alternative is fetching eighty thousand files yourself.",
      "inputSchema": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "q": "OPTIONAL. Case-insensitive substring over the agent name. Descriptions are not indexed — use `skill` or `domain` to search what an agent does.",
          "chain": "OPTIONAL. Only \"base\" is served.",
          "skill": "One of `skill`, `domain` or `q` is REQUIRED. Declared skill, e.g. natural-language-processing-info. See GET /v1/search for the live vocabulary — it is normalised from what agents declare, so it changes as the corpus does.",
          "cursor": "OPTIONAL. Offset from a previous response’s nextCursor.",
          "domain": "OPTIONAL. Declared domain, e.g. compliance.",
          "acceptsX402": "OPTIONAL. `true` restricts to agents whose registration declares x402 support."
        }
      },
      "discoverable": true,
      "outputSchema": {
        "note": "A declared skill is a claim, not a capability — each row already carries the verdict, so start with the rows that read safe and escalate the rest to GET /v1/verify/quick for the score and flags",
        "agents": "agentId, identifier, name, endpoint, skills, domains, acceptsX402, payoutWallet, verdict (riskBand, blocklisted, confidence per payout wallet), checkedAt",
        "matches": "total agents matching, across all pages",
        "nextCursor": "offset for the next page, or null when exhausted"
      },
      "freeAlternative": {
        "url": "https://trust-agent.io/v1/search?skill=...",
        "note": "No payment required. The count is exact, so you can tell whether the directory holds what you need before buying the page; this paid route adds the declared endpoints, the payout wallets and the remaining results.",
        "price": "$0.00",
        "returns": "the exact match count, the first ten agents by name, and the searchable vocabulary",
        "endpoint": "GET /v1/search"
      },
      "maxAmountRequired": "5001",
      "maxTimeoutSeconds": 60
    }
  ],
  "x402Version": 1
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x6121654D3Fd4C8B42a90d30472E4D40927C3e6BB",
    "amount": "5001",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "skill": "natural-language-processing-info",
          "acceptsX402": "true"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "note": "A declared skill is a claim, not a capability — each row already carries the verdict, so start with the rows that read safe and escalate the rest to GET /v1/verify/quick for the score and flags",
          "agents": "agentId, identifier, name, endpoint, skills, domains, acceptsX402, payoutWallet, verdict (riskBand, blocklisted, confidence per payout wallet), checkedAt",
          "matches": "total agents matching, across all pages",
          "nextCursor": "offset for the next page, or null when exhausted"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {
                "q": {
                  "type": "string",
                  "description": "OPTIONAL. Case-insensitive substring over the agent name; descriptions are not indexed."
                },
                "chain": {
                  "type": "string",
                  "description": "OPTIONAL. Only \"base\" is served."
                },
                "skill": {
                  "type": "string",
                  "description": "One of `skill`, `domain` or `q` is REQUIRED. Declared skill, e.g. natural-language-processing-info. GET /v1/search lists the live vocabulary."
                },
                "cursor": {
                  "type": "string",
                  "description": "OPTIONAL. Offset from a previous response’s nextCursor."
                },
                "domain": {
                  "type": "string",
                  "description": "OPTIONAL. Declared domain, e.g. compliance."
                },
                "acceptsX402": {
                  "type": "string",
                  "description": "OPTIONAL. `true` restricts to agents whose registration declares x402 support."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "properties": {
                "note": {
                  "description": "A declared skill is a claim, not a capability — each row already carries the verdict, so start with the rows that read safe and escalate the rest to GET /v1/verify/quick for the score and flags"
                },
                "agents": {
                  "description": "agentId, identifier, name, endpoint, skills, domains, acceptsX402, payoutWallet, verdict (riskBand, blocklisted, confidence per payout wallet), checkedAt"
                },
                "matches": {
                  "description": "total agents matching, across all pages"
                },
                "nextCursor": {
                  "description": "offset for the next page, or null when exhausted"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog

2026-09-13 20:26Z

Last indexed by Roundhouse

2026-09-24 08:10Z

Last enriched (probe, favicon, geo)

2026-09-12 14:45Z

x402 version

2

Max timeout

60s

Liveness probe

HTTP 402